Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 97
enter of gravity of the baseBCD, and hence the center ofgravity of the tetrahedron willbe found somewhere in this line.By similar reasoning it may beshown to lie in the line BF<drawn from B to _F, the cen-ter of gravity of ADC. Now,as BF and AF are both in the Fig. 58. plane ABB, they must… … CENTER OF GRAVITY. 87 but therefore, EGAG EF _HF _1AB~SA~ i, or = ^ JTA Since every pyramid may be divided into a number oftetrahedra having a common vertex, and their bases in thebase of the pyramid, the center of gravity of a pyramid willlie in a plane drawn parallel to the base at one-fourth…
Physics
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